Remember when CP has said stuff about the new system defender game? Well it's here! First let's go to the EPF headquarters and over to the red screen.

It will pop up a menu... You must choose between advanced or tutorial. I would do the tutorial first :) So here's what Gary says durring the tutorial:

In human words what you have to do is defeat the robots. You must choose a gun and set it down on one of the glowing areas. The set it down and watch it deactivate robots! The reason why some are blocked out is because you must have enough battery power, and you gain that by deactivating the robots. Now once you have 500 battery power, you can click the wheel to upgrade one of your guns. You don't want the robots reaching the blue circuit board. I hope that clears it up :)